I've definitely been asked to change dice-rolling or coin-flipping type randomness to ensure a certain distribution - that is, make sure that some unlucky user doesn't lose ten out of ten coin tosses. Usually this means weighting against repeats or outcomes we've already seen, or by switching to a "pull tiles from a bag / shuffle" type randomness.

Nothing unfair about that, though; and in fact it makes the gambler's fallacy not a fallacy!

Someone (wang?) says he could channel his magic continually to take the place of the nerves in his hands - but he would not be able to do any other magic. Basically the choice that the man with the severed spine made.